Super Mario Land 2: Remake (Huge Update)

[Vipershark]

I think the worst part about the tree is the lack of contrast on the green part. (Are those leaves?)

If you notice, everything in the foreground (and even the tree trunk) has an outline that is much darker than the color inside of it. With the greenery of the tree, the outline is darker, but it's harder to make out and blends in with the rest of the color, making it look out of style.